facialsessions

Can anyone help me with information regarding a movie? I do not know who is in it or what the title is. I DO know that it is from either the 1950s or early 1960s It is in wonderful technicolor. It is about a summer vacation at the beach on an island. It juxtaposes and daughter and her boyfriends secret summer affair with the mother's secret summer affair. It's drama. It is not Bonjour Tristesse.